双翼弧平式长螺旋锚杆成孔钻具工艺技术研究

The Processing Technology Research on the Wings Arc Flat-type Rotary Vane Long Screw Anchor Holed Drilling Tool

通过对以往黏性土层锚杆钻具成孔出现的问题分析,查明了常规取芯钻具与短螺旋钻具在水平方向小角度成孔过程中,土体失去了原始均衡应力造成钻孔缩径,使扰土不能及时输出孔外,是产生堵孔塌孔的直接原因。为此研制了长螺旋锚杆成孔钻具,解决了成孔时扰土输出问题,创新的旋板解决了钻孔内壁土颗粒结构松弛问题,并且彻底解决了在黏性土层中锚杆成孔塌堵现象,保证锚杆成孔设计角度,形成一套较为标准的长螺旋锚杆钻具成孔操作规则。

Through the problem which clay layer anchor rod drilling tool the hole appears by the past is analysised, the immediate cause of the blocking holes and the collapsed hole that the old style core drilling tool and the short screw drilling tool became in the hole proce in the horizontal direetion small angle, the soil loss of the original balance of the stress caused by drill- ing reduetion diameter, so that soil disturbance can not be timely output hole. Thus the long screw anchor holed drilling tool is developed, the question that holed harassed the earth output has solved, the innovation rotary vane has solved the problem of the drill hole endophragrn earth granular structure relaxation. The phenomenon that anchor rod holed has stopped up in the clay layer is settled thoroughly. The angle which anchor rod holed designs is guaranteed. A set of the comparatively standard rules that long screw anchor holed drilling tool operating forms.